The Tor Browser / file comparison
comparison: nsprpub/pr/tests/time.c
nsprpub/pr/tests/time.c
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:39f6d8e0a808 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* | |
| 7 * Program to test different ways to get the time; right now it is tuned | |
| 8 * only for solaris. | |
| 9 * solaris results (100000 iterations): | |
| 10 * time to get time with time(): 4.63 usec avg, 463 msec total | |
| 11 * time to get time with gethrtime(): 2.17 usec avg, 217 msec total | |
| 12 * time to get time with gettimeofday(): 1.25 usec avg, 125 msec total | |
| 13 * | |
| 14 * | |
| 15 */ | |
| 16 /*********************************************************************** | |
| 17 ** Includes | |
| 18 ***********************************************************************/ | |
| 19 /* Used to get the command line option */ | |
| 20 #include "plgetopt.h" | |
| 21 | |
| 22 #include "nspr.h" | |
| 23 #include "prpriv.h" | |
| 24 #include "prinrval.h" | |
| 25 | |
| 26 #include <stdio.h> | |
| 27 #include <stdlib.h> | |
| 28 #include <string.h> | |
| 29 #include <sys/time.h> | |
| 30 | |
| 31 #define DEFAULT_COUNT 100000 | |
| 32 PRInt32 count; | |
| 33 | |
| 34 time_t itime; | |
| 35 hrtime_t ihrtime; | |
| 36 | |
| 37 void | |
| 38 ftime_init() | |
| 39 { | |
| 40 itime = time(NULL); | |
| 41 ihrtime = gethrtime(); | |
| 42 } | |
| 43 | |
| 44 time_t | |
| 45 ftime() | |
| 46 { | |
| 47 hrtime_t now = gethrtime(); | |
| 48 | |
| 49 return itime + ((now - ihrtime) / 1000000000ll); | |
| 50 } | |
| 51 | |
| 52 static void timeTime(void) | |
| 53 { | |
| 54 PRInt32 index = count; | |
| 55 time_t rv; | |
| 56 | |
| 57 for (;index--;) | |
| 58 rv = time(NULL); | |
| 59 } | |
| 60 | |
| 61 static void timeGethrtime(void) | |
| 62 { | |
| 63 PRInt32 index = count; | |
| 64 time_t rv; | |
| 65 | |
| 66 for (;index--;) | |
| 67 rv = ftime(); | |
| 68 } | |
| 69 | |
| 70 static void timeGettimeofday(void) | |
| 71 { | |
| 72 PRInt32 index = count; | |
| 73 time_t rv; | |
| 74 struct timeval tp; | |
| 75 | |
| 76 for (;index--;) | |
| 77 rv = gettimeofday(&tp, NULL); | |
| 78 } | |
| 79 | |
| 80 static void timePRTime32(void) | |
| 81 { | |
| 82 PRInt32 index = count; | |
| 83 PRInt32 rv32; | |
| 84 PRTime q; | |
| 85 PRTime rv; | |
| 86 | |
| 87 LL_I2L(q, 1000000); | |
| 88 | |
| 89 for (;index--;) { | |
| 90 rv = PR_Now(); | |
| 91 LL_DIV(rv, rv, q); | |
| 92 LL_L2I(rv32, rv); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 static void timePRTime64(void) | |
| 97 { | |
| 98 PRInt32 index = count; | |
| 99 PRTime rv; | |
| 100 | |
| 101 for (;index--;) | |
| 102 rv = PR_Now(); | |
| 103 } | |
| 104 | |
| 105 /************************************************************************/ | |
| 106 | |
| 107 static void Measure(void (*func)(void), const char *msg) | |
| 108 { | |
| 109 PRIntervalTime start, stop; | |
| 110 double d; | |
| 111 PRInt32 tot; | |
| 112 | |
| 113 start = PR_IntervalNow(); | |
| 114 (*func)(); | |
| 115 stop = PR_IntervalNow(); | |
| 116 | |
| 117 d = (double)PR_IntervalToMicroseconds(stop - start); | |
| 118 tot = PR_IntervalToMilliseconds(stop-start); | |
| 119 | |
| 120 if (debug_mode) printf("%40s: %6.2f usec avg, %d msec total\n", msg, d / count, tot); | |
| 121 } | |
| 122 | |
| 123 int main(int argc, char **argv) | |
| 124 { | |
| 125 /* The command line argument: -d is used to determine if the test is being run | |
| 126 in debug mode. The regress tool requires only one line output:PASS or FAIL. | |
| 127 All of the printfs associated with this test has been handled with a if (debug_mode) | |
| 128 test. | |
| 129 Usage: test_name -d | |
| 130 */ | |
| 131 PLOptStatus os; | |
| 132 PLOptState *opt = PL_CreateOptState(argc, argv, "d:"); | |
| 133 while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) | |
| 134 { | |
| 135 if (PL_OPT_BAD == os) continue; | |
| 136 switch (opt->option) | |
| 137 { | |
| 138 case 'd': /* debug mode */ | |
| 139 debug_mode = 1; | |
| 140 break; | |
| 141 default: | |
| 142 break; | |
| 143 } | |
| 144 } | |
| 145 PL_DestroyOptState(opt); | |
| 146 | |
| 147 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); | |
| 148 PR_STDIO_INIT(); | |
| 149 | |
| 150 if (argc > 1) { | |
| 151 count = atoi(argv[1]); | |
| 152 } else { | |
| 153 count = DEFAULT_COUNT; | |
| 154 } | |
| 155 | |
| 156 ftime_init(); | |
| 157 | |
| 158 Measure(timeTime, "time to get time with time()"); | |
| 159 Measure(timeGethrtime, "time to get time with gethrtime()"); | |
| 160 Measure(timeGettimeofday, "time to get time with gettimeofday()"); | |
| 161 Measure(timePRTime32, "time to get time with PR_Time() (32bit)"); | |
| 162 Measure(timePRTime64, "time to get time with PR_Time() (64bit)"); | |
| 163 | |
| 164 PR_Cleanup(); | |
| 165 return 0; | |
| 166 } | |
| 167 | |
| 168 | |
| 169 |
